Does silicone float?

Silicone, a synthetic polymer, is composed of silicon, oxygen, and additional elements like carbon or hydrogen.

Depending on its chemical composition, silicone can be engineered to have a variety of properties, such as low density, buoyancy, and stability in extreme temperatures. Generally speaking, silicone is not naturally buoyant, but it can be made to be lighter than water and have a low density, which allows it to float in water. Depending on its chemical composition, silicone can be designed to be more or less buoyant. Generally speaking, the more volatile elements contained within the material will increase its buoyancy and make it float better.

A Case Study of Silicone as Breast Implants.  

1)Does Silicone as a Breast Implant Float?

Water and saline filling, which are found in breast implants, have comparable densities. As a result, regardless of size, implants won’t make you float or sink. Nonetheless, some data suggests that implants may increase resistance in the water and slow a swimmer down. It can be a little bit of a challenge if you are a competitive swimmer.

Flotation devices are not breast implants. They are not going to make you float. They aren’t a good substitute for a life jacket. Breast implants—even those positioned above the chest muscles—cannot make a person appear to float. Any kind of breast implant, regardless of size, shape, fullness, or density, can attest to this. For most women, there’s no need to worry about breast implants interfering with their ability to swim comfortably.

2) Is it Possible to Swim With Breast Implants?

For the average swimmer, swimming with breast implants is just like swimming without them. Like natural breast tissue, breast implants are neutrally buoyant and will float or sink according to your movements. They will also submerge as far as you take them. Nonetheless, swimmers who compete could notice a small amount of drag from the increased size of enhanced breasts.

An example of silicone breast implants.

Silicone and it’s Weight

One may easily determine the specific gravity of silicon, which is a metal and an element. Silicone is a substance that is commonly used in many household products such as putty, glue, caulking, and synthetic rubber substitutes. Its specific gravity varies according to the material, but it is often within 15% of that of water, with some being heavier than water. This implies that while some silicone material sinks in water, some will float. A human body’s general specific gravity is less than 1.0 due to the presence of some air-filled cavities. The human body will typically float in water because of this. The specific gravity and composition of a silicone human shape will determine whether it floats or sinks.

Why Only LSR Silicone Float on Water

The laws of buoyancy explain why only hollow LSR components float in water. If an object is lighter than the fluid it is submerged in, the force of buoyancy will push it upward. LSR parts will float on top of water because they are substantially lighter than it. Another factor contributing to LSR parts’ capacity to float on water is their hollow design. Any cavity inside an object filled with air will cause the thing to be buoyed up by the force of buoyancy because air is less dense than water. This explains why hollow LSR parts, like those found in food-grade and medical applications, float on water.

Eg of light silicone rubber (LSR)

The Gravity of Silicone

The specific gravity of our N-Series silicone ranges from 1.14 to 1.44, and its durometer is available in 40, 50, 60, 70, and 80. Post-cure compounds for molded and extruded applications are not available in this series.

In addition, silicone’s buoyancy can be influenced by its shape. It will float more effectively if the silicone is formed in a way that produces air pockets and increases its weight. This is the reason silicone is used to build products like pool noodles, which are intended to contain air pockets all over their structure to aid in floating. In summary, silicone is not naturally buoyant, but it may be made to float by engineering it to have a low density and unique forms. Silicone may be manufactured to float in liquids like water with the correct engineering know-how.

Silicone Parts and Its Ability to Float on Water

In this regard, the viewers will like to ask some questions:

-Is Silicone Hard or Soft?

Compared to ionic salts, covalent solids—like silicon—are brittle and stiff because dislocations in them only move at extremely high temperatures. Although this phenomenon is essential to comprehending the physics of materials and structures, an appropriate explanation for it has not yet been discovered.

An example of hard silicone below:

What is Silicone’s Density?

Even within the same type of implants (McGhan Style 410), the evaluated silicone implants for the breasts differ in density from 1.02 to >1.07 g/ml, depending on the mass of the implants. Additionally, the silicone implant density is not always uniform.

Types of Silicone?

-High Consistency rubber


-Liquid Silicone

Is Silicone in Gas or Solid Liquid Form?

There are solid silicone resin shapes available, albeit they are not very common. Liquid silicone resin is a common type of sale. Furthermore, paints and coatings are the main products made with silicone resins. They are mostly used in a variety of products to help improve the products’ safety, consistency, and dependability.

Is Silicone Better than Rubber?

In contrast, silicone is a more robust elastomer. These are only some of silicone’s many positive qualities. Nevertheless, silicone rubbers fatigue more quickly than biological rubbers. It is a disadvantage of this rubber shape. It also presents production challenges due to its high viscosity and poor flow characteristics.


In conclusion, because of their light weight and capacity to hold air inside their hollow characteristics, only hollow LSR pieces are able to float on water. This happens as a result of the object being propelled upward in a fluid medium by buoyancy.

LSR parts are therefore suitable for a wide range of uses where their ability to float on water is required. With a density of 1.10 to 1.50 g/cm3 (natural rubber has a density of 0.92 g/cm3, while EPDM has a density of 0.86 g/cm3), liquid silicone rubber (LSR) sinks in water.

Along with other factors, temperature and pressure have a big impact on the specific volume. Because these LSR parts are hollow, they have an air pocket inside of them that allows them to float. Crushed, they fill with water, releasing trapped air and causing them to sink.

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